Senior Software Engineer Mock Interview

Practice 47 Senior Software Engineer interview questions covering system design, architecture decisions, and technical leadership.

Question 1 of 47

Can you discuss how functional programming differs from object-oriented programming?

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William Swansen

William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.

As a senior software engineer, you should be intimately familiar with both object-oriented and functional programming. An interviewer will ask you this question to confirm that you are aware of the different types of programming and some of the languages used in each type. They expect you to be able to describe both the similarities and differences between these. They may also want you to state your preference for which type of programming you prefer or use regularly.

William Swansen

"I've used both functional and object-oriented programming in my previous jobs. Functional programming relies on immutable objects, while object-oriented programming takes advantage of the mutable state and in-place modification of objects within the code. Functional programs are structured so that inputs are used in calculations and result in the desired output. Functional programming relies on the function of the software. In contrast, object-oriented programming consists of classes, instances, and variables that the program can manipulate. These may be inherited or extended, thus simplifying the coding. Languages typically used in functional programming include Clojure, F#, Erlang, and Common Lisp. Object-oriented languages include Java, C, C, and others."

William Swansen

When answering this question, summarize each type of programming, describe the languages used, and talk about your experience with or preference for these. Your pre-interview research should have indicated the type of programming that the organization currently uses or prefers. Your answer can also reflect the best methodology for the products they create for either internal use or commercial sale.

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Anonymous Answer

The main difference is that functional programming works on stateless, immutable data whereas OOP uses mutable state data. Functional programming acts like a set of instructions that can be applied to an immutable dataset and the functions themselves do not cause side effects. Functional programming can be beneficial in that it can be quicker to write and requires less system resources to execute and allows for parallel programming. OOP on the other hand allows you to abstract your code into classes with clear expectations and allows child classes to inherit parent class attributes and functions thereby simplifying the code in the child class and making the test cases more simple. OOP also allows for the concept of Encapsulation to apply which can prevent unauthorized users from accessing key data.

Amanda's Feedback

Well said! You've explained the difference between the two as well as the benefits of each. If you've recently worked on projects that required you to choose between utilizing functional programming or OOP, explain why you chose each and how you applied it to the project. This helps to demonstrate that you have put your analytical mindset to work and make the appropriate choice based on the needs of the project.

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47Senior Software Engineer Interview Questions & Answers

Technical

1.Can you discuss how functional programming differs from object-oriented programming?

Technical

2.Do you recommend using a microservice approach or a monolithic app when developing a software program?

Operational

3.Please describe how you would refactor a class for easier testing.

Operational Software Enginee

4.If you were asked about addressing a website's degrading performance, what recommendations would you make to correct this?

Technical

5.Can you discuss responsive design and the differences between fixed and fluid layouts?

Operational

6.What methodologies do you use to ensure that your program will scale?

Operational

7.When do you use black box testing and white box testing to test a website?

Operational

8.Describe for me some of the techniques you use to monitor the performance of your software.

Operational

9.Describe to me how you organize CSS files and why you prefer your approach.

Operational

10.How do you structure data tables if you create a program to manage a point of sale operation?

Technical

11.How does HTML5 use web workers, and why is this important?

Operational

12.What is harding and how is it used in the programs you create?

Operational

13.What criteria do you use when deciding whether to use a SQL solution instead of NoSQL for your project?

Tehcnical

14.What is the difference between blocking and non-blocking calls in JavaScript?

Operational

15.Please walk me through the process you use to decide between two technologies when both will get the job done.

Operational

16.Can you demonstrate how you would implement Dijkstra's Shortest Path in the programming language you normally work with?

Operational

17.Describe to me how you would implement a linear search in JavaScript.

Operational

18.As a senior software engineer, you will be expected to lead a development team. How would you prioritize the tasks you assign to each developer to improve collaboration?

Technical

19.How does a data array differ from a stack?

Operational

20.Please walk me through the process you use when assigned a programming project, starting with defining the requirements and going through delivery.

Technical

21.What is a stack in the context of software development, and how can it be used to simplify the SDLC?

Operational

22.What programming languages do you recommend an organization like ours use to create software to support our operations?

Operational

23.How do you direct your team to identify and correct errors in their code?

Discovery

24.What experience do you have with Agile software development? What do you like about this methodology?

Operational

25.Walk me through the process of creating an SQL database for time-series information?

Discovery

26.Tell me about a recent project you managed that relied on a source control system to direct your team.

Discovery

27.Are you familiar with service-oriented architectures? When do you use them?

Discovery

28.What was the biggest development team you have managed and what was the biggest challenge you faced?

Operational

29.When do you feel it is appropriate to follow "procedural" logic when developing software?

Operational

30.Can you describe the design patterns you use and when you use them?

Behavioral

31.Can you describe a time you were asked to do something you had never done before? How did you react?

Behavioral

32.Please describe a situation where you needed to adapt a process, procedure, or technology differently from how you usually did things.

Behavioral

33.Can you recall a time you were assigned a task that wasn't a part of your job description? How did you handle this, and what was the outcome?

Behavioral

34.Tell me about an aspect of your profession that makes you the most satisfied, energized, and productive at work.

Behavioral

35.What's a misconception your coworkers have about you, and why do you believe they feel this way?

Behavioral

36.Can you give me an example of when you had to work with someone difficult to get along with? How did you handle the situation?

Behavioral

37.Please tell me about a time when something major didn't go according to plan at work.

Behavioral

38.Describe a situation where you needed to persuade someone about an idea or process.

Behavioral

39.Can you give me an example of a time you led by example and describe what you did and how your team reacted?

Behavioral

40.Tell me about a difficult decision you had to make in one of your previous roles.

Behavioral

41.Can you recall a time your manager was unavailable when a situation arose that demanded an immediate resolution? How did you react?

Discovery

42.When was the last occasion you asked for direct feedback from your manager?

Discovery

43.Can you tell me what your home network consists of?

Discovery

44.What is a professional achievement that you are proud of?

Discovery

45.Why did you choose to interview with our organization rather than with others in our industry?

Discovery

46.What's the most interesting thing about you that I didn't see on your resume?

Discovery

Senior Software Engineer Mock Interview

Can you discuss how functional programming differs from object-oriented programming?

47Senior Software Engineer Interview Questions & Answers

1.Can you discuss how functional programming differs from object-oriented programming?

2.Do you recommend using a microservice approach or a monolithic app when developing a software program?

3.Please describe how you would refactor a class for easier testing.

4.If you were asked about addressing a website's degrading performance, what recommendations would you make to correct this?

5.Can you discuss responsive design and the differences between fixed and fluid layouts?

6.What methodologies do you use to ensure that your program will scale?

7.When do you use black box testing and white box testing to test a website?

8.Describe for me some of the techniques you use to monitor the performance of your software.

9.Describe to me how you organize CSS files and why you prefer your approach.

10.How do you structure data tables if you create a program to manage a point of sale operation?

11.How does HTML5 use web workers, and why is this important?

12.What is harding and how is it used in the programs you create?

13.What criteria do you use when deciding whether to use a SQL solution instead of NoSQL for your project?

14.What is the difference between blocking and non-blocking calls in JavaScript?

15.Please walk me through the process you use to decide between two technologies when both will get the job done.

16.Can you demonstrate how you would implement Dijkstra's Shortest Path in the programming language you normally work with?

17.Describe to me how you would implement a linear search in JavaScript.

18.As a senior software engineer, you will be expected to lead a development team. How would you prioritize the tasks you assign to each developer to improve collaboration?

19.How does a data array differ from a stack?

20.Please walk me through the process you use when assigned a programming project, starting with defining the requirements and going through delivery.

21.What is a stack in the context of software development, and how can it be used to simplify the SDLC?

22.What programming languages do you recommend an organization like ours use to create software to support our operations?

23.How do you direct your team to identify and correct errors in their code?

24.What experience do you have with Agile software development? What do you like about this methodology?

25.Walk me through the process of creating an SQL database for time-series information?

26.Tell me about a recent project you managed that relied on a source control system to direct your team.

27.Are you familiar with service-oriented architectures? When do you use them?

28.What was the biggest development team you have managed and what was the biggest challenge you faced?

29.When do you feel it is appropriate to follow "procedural" logic when developing software?

30.Can you describe the design patterns you use and when you use them?

31.Can you describe a time you were asked to do something you had never done before? How did you react?

32.Please describe a situation where you needed to adapt a process, procedure, or technology differently from how you usually did things.

33.Can you recall a time you were assigned a task that wasn't a part of your job description? How did you handle this, and what was the outcome?

34.Tell me about an aspect of your profession that makes you the most satisfied, energized, and productive at work.

35.What's a misconception your coworkers have about you, and why do you believe they feel this way?

36.Can you give me an example of when you had to work with someone difficult to get along with? How did you handle the situation?

37.Please tell me about a time when something major didn't go according to plan at work.

38.Describe a situation where you needed to persuade someone about an idea or process.

39.Can you give me an example of a time you led by example and describe what you did and how your team reacted?

40.Tell me about a difficult decision you had to make in one of your previous roles.

41.Can you recall a time your manager was unavailable when a situation arose that demanded an immediate resolution? How did you react?

42.When was the last occasion you asked for direct feedback from your manager?

43.Can you tell me what your home network consists of?

44.What is a professional achievement that you are proud of?

45.Why did you choose to interview with our organization rather than with others in our industry?

46.What's the most interesting thing about you that I didn't see on your resume?

47.What motivated you to make a move from your current role?